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NR 507 WEEK 2 QUIZ / QUESTIONS AND ANSWERS 2023/2024 GRADED A. $11.49
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NR 507 WEEK 2 QUIZ / QUESTIONS AND ANSWERS 2023/2024 GRADED A.
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NR 507 WEEK 2 QUIZ / QUESTIONS AND ANSWERS 2023/2024 GRADED A. Downloaded by dennis murimi () Question 2 2 / 2 pts In hyperkalemia, cardiac rhythm changes are a direct result of cardiac cell hypopolarization. cardiac cell repolarization. cardiac cell hyperexcitability. depression of the...

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  • November 28, 2023
  • 19
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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NR 507 WEEK 2
QUIZ / QUESTIONS
AND ANSWERS
2023/2024 GRADED
A.

,Question 1
pts
In hyperkalemia, cardiac rhythm changes are a direct result of




cardiac cell hypopolarization.


cardiac cell repolarization.


cardiac cell hyperexcitability.


depression of the sinoatrial (SA) node.
If extracellular potassium concentration increases without a significant change in
intracellular potassium, the resting membrane potential becomes more positive (i.e.,
changes from –90 to –80 mV) and the cell membrane is hypopolarized (the inside of the
cell becomes less negative or partially depolarized [increase excitability]). (Electrical
properties of cells are discussed in Chapter 1.)


Question 2
pts
Water movement between the intracellular fluid compartment and the extracellular compartment is
primarily a function of


plasma oncotic pressure.


antidiuretic hormone.


hydrostatic forces.



osmotic forces.
The movement of water between ICF and ECF compartments is primarily a function of
osmotic forces. (Osmosis and other mechanisms of passive transport are discussed in
Chapter 1.)




Downloaded by dennis murimi ()

, Question 3
pts
Chvostek sign and Trousseau sign indicate




hypocalcemia.


hyperkalemia.


hypercalcemia.


hypokalemia.
Two clinical signs are Chvostek sign and Trousseau sign.


Question 4
pts
Physiologic pH is maintained around 7.4 because bicarbonate (HCO3) and carbonic acid (H2CO3) exist in a
ratio of




20:1.


10:5.


10:2.


1:20.
The relationship between bicarbonate and carbonic acid is usually expressed as a ratio.
When the pH is 7.40, this ratio is 20:1 (bicarbonate/carbonic acid).


Question 5
pts
What is a major determinant of the resting membrane potential necessary for transmission of nerve
impulses?


The ratio between intracellular Na+ and extracellular K+


The ratio between intracellular K+ and extracellular Na+




Downloaded by dennis murimi ()

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